Device for manufacturing artificial silk



Feb. 18, 1930. KEMPF 1,747,475

DEVICE FOR MANUFACTURING ARTIFICIAL SILK Filed Jan. 15. 1928 PatentedFeb; 18, 1930 UNITED STATES HUIBEBT KEMPF, OE BARMEN, GEIfiMANY DEVICEFOR MANUFACTURING- .A RTIFICIAL SILK Application filed January 13, 1928,Serial No.

The invention relates to a device for manufacturing artificial silk, inwhich the threads freshly spun are for the purpose of being consolidatedconducted througha hardening liquid. There is already well known adevice in which the hardening liquid is in a trough which isfixed inplace and which extends throughout the entirelength of the spinningmachine, and vwhich is provided in both side walls with narrow slotsopen above, through which the artificial threads are passed. A portionof the hardening liquid in the trough flows away continuously throughthese slots and is continually replaced by a suitable injux. v

I This well known contrivance has in general proved of value. It rendersit necessary however to arran e in' addition to the fixed trough aspecial thread guide which is mov-. able transversely with regard to thethreads.

Such a disadvantage for instance is that 0wing to the relativedisplacement between thread guide and trough there will be caused at thepoints of motion-reversal sharp bends in the not yet fully hardenedartificial filaments, which produce strong rubbing friction of thethreads on the slot edges and consequent wear upon the tender threads,which greatly impairs the quality of the goods. According to the presentinvention this-defect is avoided by the trough and thread guides beingsimultaneously reciprocated horizontally transversely with re pect tothe threads while at the same time precautions are taken to ensure thatwhen the motion of the trough is reversed, the hardening liquid does notslop over the'edge of the trough. For this purpose the trough may eitherbe provided with transverse partition walls or better still besubdivided into a number of individual troughs, each of which suitablyextends over only one bundle of threads and' accordingly possesses onlyone narrow entrance slot and exit slot for the bundle of threads inquestion. Thissubdivision intoindividual troughs provided with narrowpassage-slots has in addition to the well-known advantages of the troughand ofits slots the still further advantage that the mass to bereciprocated during the/ passage of the thread, particularly the246,565, and in Germany February '1, 1927.

mass of the liquid is reduced and that moreover a saving of acid'can beeffected when parts of the machine are not running, since in some partsthe influx of the hardening liquid (acid) may be stopped.

The hardening liquid passing out of the trough slots may moreoversuitably be further utilized by being conducted after leaving the troughon to the reel or on to the threads of artificial silk situated thereon.For this purpose there is arranged for each individual trough and underits slots an-overflow gutter or channel participating in the motion ofthe trough, the arrangement being suchthat the liquid passing out of theslots is conducted directly on to the wound up artificial threads inorder thereby to effect additional subsequent hardening and removal ofcopper. In consequence of the lateral motion of the overflow gutter orof the channel, the whole width of the wound up artificial threads isthereby sprinkled. The formation of the trough-slots themselves may beeffected either in the same manner as before that is, the slot-edges mayconsist of acid-resisting steel, but the employment of glass, porcelain,and other hard acid-resisting materials has proved suitable. Theemployment of glass, porcelain and the like is particularly advantageouswhen the slot-edges consist of the same material as the. trough itselfor even form an integral part of the trough.

For guiding the thread there may either be arranged behind thetrough-slots special reciprocating thread-guides or on the other handthe trough-slots themselves may serve as thread-guides in which casecare must be taken that sharp corners which might possibly injure thethread are avoided at the slots. When the trough is made with slot-edgesof porcelain or glass this end, as canbe readily be seen, can beattainedin a, simple and perfeet manner.

Three constructional examplesof the invention are represented in thedrawing in which v Fig, 1 shows a vertical cross-section through theessential parts of the spinning device in the plane of the thread, and

reel,

Fig. 2 an elevation from the. side of the Figs. 3 and 4 show theconstruction of the trough and of the return channels appertaininthereto in a single piece.

1g. 5 shows a vertical longitudinal section through a trough extendingacross the by these means the level of the liquid in the trough is keptat'about the height indicated by the mark m. In the neighborhood of'eachof the ends of the trough there is to be found a a narrow slot 0 whichis bordered by the two shanks of an upright U-shaped piece e which inits turn is located in the wall of the trough d. The troughitselfconsists for its part advantageously of glass, porcelain or otheracidresistin material; likewise the piece e serving to orm. the edges ofthe slot. Said piece may nevertheless consist advantageously of acidresisting steel or of other suitable elastic material, and by virtue ofits elasticity may be connected with the troughin such a manner as to becapable of being exchanged. On the other hand, if desired, the edgesofthe slot may be formeddirectly by the trough I wall, the special piece6 being dispensed with.

The slots 0 serve for'the passage of the thread I) while simultaneouslyalso a portion of the hardening liquid flows away outwards through theseslots. Outside and below these slots 0 the trough is provided at eachend with a beak-shapedoutlet 17 by means of which the escaping hardeninliquid is conducted into a sloping channel which is situated under saidoutlets and which is embedded in the beam 9, and from the latter on tothe reel f or on to the thread wound thereon, so that there takes placean additional after-treatment of the thread on the reel.

'I'he beam g, as is evident from Fig. 2, is mounted at its ends,with theaid of a roller 9, on a fixed support 7- and is connected with adriving-cam h by means of which it can be reciprocated transversely withregard to the threads in a horizontal plane, in order thereby to effectwith the aid of the trough-slots which serve as thread-guides theordinary cross-winding of the threads on the reel.

By providing the thread guides on the trough, and thereby causing saidthread guides to be reciprocated with the trough, wear upon the threadsat the points they traverse the guides is prevented and a better gradeof silk produced.

InFigs. 3 and 4 there is represented a sec- 0nd constructional form ofthe trough, the

scale being somewhat larger. This constructional formis distinguishedfrom the constructional form according to Figs. 1 and 2 merely .by' theunder return-channel k together with the trough 0? consisting of asingle piece. I

Fig. 5 shows a trough m extending throughout the entire length of thespinning machine, subdivided into a number of individual troughs bymeans of transverse walls y, parallel with the threads. It will readilybe understood that by subdividing the trough like this, an overflow ofthe hardening liquid at the ends of the trough, owing to the movement ofthe liquid in the directions indicated by the arrows, will be prevented.-It is not necessary that the subdivisions of the trough should beseparated from each other entirely, but merely as much as is needed tocalm down the movement of the liquid, and to prevent it fromoverflowing. Thesubdivisions may communicate, as shown, thereby assuring.for the liquid the same level in all parts of the trough.

Claims: f

1. In a device of the character set forth for making artificial silk, areciprocable trough for holding the hardening liquid adapted forhorizontal reci' rocation cross-wise of the thread travel, t e front andrear cross-walls of the trough having slots for the overflow anddischarge of the hardening liquid and serving also as' guides for thethread or threads, and means for reciprocating said trough.

2. In a device of the character set forth for making artificial silk, areciprocable trough for holding the hardening liquid adapted forhorizontal reciprocation crosswise of the thread travel, the front andrear cross-walls of the trough presenting combined thread slots andoverflow gutters, means for feeding hardener to the trough, means forreciprocating the trou h, and artition walls in the trough arrangedcross-wise of the thread travel.

3. In a device according to claim 1, the feature that the reciprocablehardening trough is subdivided into a series of individual troughs, eachone of which presents combined thread slots and overflows in its endwalls, and cross walls throughout the series guides o acid-resistingmaterial.

6. In a device of the character set forth, a reciprocatory trough forholding the hardener adapted for horizontal reciprocation IIItransversely to the threadtravel, the inner U and outer end cross-wallsof the trough presenting combined thread and overflow slots of lessdepth than the depth of the trough,

